/*
 * Copyright (C) 2004 NNL Technology AB
 * Visit www.infonode.net for information about InfoNode(R) 
 * products and how to contact NNL Technology AB.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
 * MA 02111-1307, USA.
 */

// $Id: TabbedHoverUtil.java,v 1.8 2005/12/04 13:46:05 jesper Exp $

package net.infonode.tabbedpanel.internal;

import net.infonode.tabbedpanel.TabbedPanel;
import net.infonode.tabbedpanel.TabbedPanelContentPanel;
import net.infonode.tabbedpanel.TabbedPanelHoverPolicy;

import java.awt.*;
import java.util.ArrayList;

/**
 * @author johan
 */
public class TabbedHoverUtil {
	private TabbedHoverUtil() {
		// 工具类不提供构造函数
	}

	public static boolean isDeepestHoverableTabbedPanel(ArrayList enterables, TabbedPanel tp) {
		Component c = (Component) enterables.get(0);
		while (c != null) {
			TabbedPanel tp2 = null;

			if (c instanceof TabbedPanel)
				tp2 = (TabbedPanel) c;

			if (c instanceof TabbedPanelContentPanel)
				tp2 = ((TabbedPanelContentPanel) c).getTabbedPanel();

			if (tp2 != null)
				if (tp2 == tp)
					return true;
				else if (tp2.getProperties().getHoverPolicy() != TabbedPanelHoverPolicy.ALWAYS_AND_EXCLUDE)
					return false;
			c = c.getParent();
		}

		return true;
	}

	public static boolean hasVisibleTabbedPanelChild(Component c) {
		if (c instanceof TabbedPanel && ((TabbedPanel) c).getProperties().getHoverPolicy() != TabbedPanelHoverPolicy.ALWAYS_AND_EXCLUDE)
			return true;

		if (c instanceof Container) {
			Container container = (Container) c;
			for (int i = 0; i < container.getComponentCount(); i++) {
				if (container.getComponent(i).isVisible() && hasVisibleTabbedPanelChild(container.getComponent(i)))
					return true;
			}
		}

		return false;
	}

	public static boolean acceptTabbedPanelHover(TabbedPanelHoverPolicy policy, ArrayList enterables, TabbedPanel tp, Component c) {
		if (policy == TabbedPanelHoverPolicy.NO_HOVERED_CHILD)
			return isDeepestHoverableTabbedPanel(enterables, tp);

		if (policy == TabbedPanelHoverPolicy.NEVER)
			return false;

		if (policy == TabbedPanelHoverPolicy.ALWAYS || policy == TabbedPanelHoverPolicy.ALWAYS_AND_EXCLUDE)
			return true;

		if (policy == TabbedPanelHoverPolicy.ONLY_WHEN_DEEPEST && c != null)
			return !hasVisibleTabbedPanelChild(c);

		return false;
	}
}